1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <title>Flotr: Mouse Zoom With Preview Example</title> <link rel="stylesheet" href="style.css" type="text/css" /> <script type="text/javascript" src="../lib/yepnope.js"></script> </head> <body> <!-- ad --> <div id="wrapper"> <h1></h1> <div id="overview" style="width:200px;height:100px;float:right;"></div> <div id="container" style="width:500px;height:250px;"></div> <h2>Example</h2> <p>This example show an enhancement of the mouse-zoom example. It displays an overview of the graph. By selecting an area in the graph or in the overview, the graph is zoomed. Read more about the <a href="http://www.solutoire.com/flotr/docs/eventhooks/" title="Flotr Event Hooks">event hooks</a>.</p> <p>Finished? Go to the example <a href="index.html" title="Flotr Example Index Page">index page</a>, play with the <a href="../../playground/index.html" title="Flotr playground">playground</a> or read the <a href="http://www.solutoire.com/flotr/docs/" title="Flotr Documentation Pages">Flotr Documentation Pages</a>.</p> <p><button id="reset-btn">Reset</button></p> <h2>The Code</h2> <pre id="code-view"><code class="javascript"></code></pre> <div id="footer">Copyright © 2008 Bas Wenneker, <a href="http://www.solutoire.com">solutoire.com</a></div> </div> <!-- ad --> <script type="text/javascript"> function example(){ var container = document.getElementById('container'), overviewContainer = document.getElementById('overview'); /** * Fill series d1 and d2. */ var d1 = []; var d2 = []; var d3 = []; for(var i = 0; i < 40; i += 0.5){ d1.push([i, Math.sin(i)+3*Math.cos(i)]); d2.push([i, Math.pow(1.1, i)]); d3.push([i, 40 - i+Math.random()*10]); } /** * Global options object. */ var options = { selection: { mode:'xy', fps:30 } }; // setup overview var overviewOptions = { lines: { show: true, lineWidth: 1 }, shadowSize: 0, grid: { color: '#999', outlineWidth: 1 }, selection: { mode: 'xy' } }; /** * Function displays a graph in the 'container' element, extending * the global options object with the optionally passed options. */ function drawGraph(opts){ /** * Clone the options, so the 'options' variable always keeps intact. */ var o = _.extend(_.clone(options), opts || {}); /** * Return a new graph. */ return Flotr.draw( container, [ d1, d2, d3 ], o ); } /** * Function displays a graph in the 'overview' element. */ function drawOverview(){ return Flotr.draw( overviewContainer, [ d1, d2, d3 ], overviewOptions ); } /** * Actually draw the graphs. */ var f = drawGraph(); var overview = drawOverview(); /** * Hook into the 'flotr:select' event. */ Flotr.EventAdapter.observe(container, 'flotr:select', function(area){ /** * Do the zooming. */ f = drawGraph({ xaxis: {min:area.x1, max:area.x2}, yaxis: {min:area.y1, max:area.y2} }); // don't fire event on the overview to prevent eternal loop overview.setSelection(area, true); }); /** * Hook into the 'flotr:select' event from overview. */ Flotr.EventAdapter.observe(overview, 'flotr:select', function(evt){ f.setSelection(evt.memo[0]); }); /** * Observe click event on the reset-btn. Reset the graph when clicked. * The drawGraph function wrapped in another function otherwise it get's * an Event object passed as first argument, while it expects an options * object. */ document.getElementById('reset-btn').onclick = function(){ drawGraph(); drawOverview(); }; }; </script> <!-- analytics --> </body> <script type="text/javascript" src="includes.js"></script> </html> |